Relay.



A. L. TOWNSENU RELAY. A APLIoAToN vFILED M123', 1911. 1,006,703. Patented 0st. 24, 19M.

A f Z mi UNITED STATES PATENT OFFICE;

A THUR L1"TOWNSEND, OF WASHINGTON, DISTRICT OF COLUMBIA; ASSIGNOB OF ONE- HALF Tfr-ALBERT A. LOHR, OF WASHINGTON, DISTRICT OF COLUMBIA.

' RELAY.

Specieation of Letters Patent.

Application filed March 23, 1911. Serial No. 616,547.

PatentedOct. 24, 1911 To all whom 'itmay concern: ,/Be it known that I, ARTHUR L. ToWNsEND,

Washington, in the District of Columbia,

have\'invented a certain new and useful Relay, of which the following is a specification.

Y My invention has for its object to provide a self-polarizing relay, which is self adjusting over the whole range of current strength as used in telegraphic work, ready to respond to the slightest changes in the strength of the line current, provided such changes are quick and sharp as when the circuit is opened and closed by the usual telegraph key. f

The invention further has for its object to provide a relay whose operative eiiiciency will not be destroyed by slow changes in the line current, such as occur when there is line leakage due to rain, fog, sleet, snow, etc. In other Words, the invention has for its object to provide a relay which will operate elicient-ly under weak current. impulses as well as strong ones, and which will automatically adjust itself and maintain its opof the line current employed.

Generically the invention embodies a relay of the polarized armature type, having provisions for polarizing the armature by the use of a differential magnet, the coils of which are connected in parallel in theline circuit. One of the coils is designed to be slow acting (i. e., slow in building up its magnetism and discharging the same) while the other is quick acting, whereby boththe make and breakmovements of the armature will be eected by both an attracting and repelling force influence of the field magnet, which may be permanently or electrically excited.

More specifically the invention includes the novel details of construction, combination and arrangement of parts, all of which in their preferred forms, will be iirstfully described and then be specifically pointed out in the appended claims, reference being had to the accompanying drawing, in which Figure lis a perspective view embodying the preferred mechanical arrangement of parts. Fig. 2 is a diagrammatic view of the form shown in Fig. 1. Fig. 3 is a diagrammatic view of a slight modification of the invention. Fig. 4 is a diagrammatic view of operating in unison, under the.

a further modification. Fig. 5 is a diagrammatic View ofstill another modification, in which theI field magnet is' permanently.y excited.

In the drawing in which like numerals and letters of reference indicate like lparts in all of the figures, 1 is the base upon which the cores l2 of the field magnet are supported from the standard 4.

3 designates the pole pieces of the field magnet which may be adjustably connected to the cores 2 if desired.

5 is the core of the differential magnet which is secured to the standard 4 and carries the windings 11,.and 12 of the differential magnet. may be rendered slow actin a non-magnetic sleeve 6 is mounted aroun the core 5'beneath the winding 12 so as to promote eddy currents and prevent the core section of the magnet 12 building up or losing its magnetism as rapidly asl does the core 5 under the winding 11.

7 designates the coils of the field magnet, and8 designates the armature which is pivotally suspended at 9 from the core 5 of the "differential magnet, the electrical continuity between the armature 8 and the core 5 being maintained-.through a wire 10.

13 and lllddesignate the binding 'which the line wires L-L (Fig. 2) are .joined and to which the coils 7 are connected. The coil 12 of the differential magnet in the preferred form of the invention is connected in series with the coil 7-of the field magnet, so that the line current entering, say via post 13 willV in turn traverse the In order that the winding 12 coils 7 and 12 in passing from the binding post 13 to binding post 14. The other coil 11 of the differential which is the quick acting one is connected in series with the line current by having its terminals connected to the binding posts 13 and 14 respectively, a non-inductive resistance 15 being interposed in this connection when the windings 11 and 12 are not relatively designed to allow for the resistance of the winding 7 When the windings 11 and 12 are properly relatively designed with regard to their respective resistances, lthe non-inductive resistance 15 may be omitted as-will be clear vto those skilled in the art.

y Instead of winding the resistance 15 noncircuit.

4. In a relay, Aa field magnet, an armature movable between the pole pieces thereof, combined lwith a differentiall armature polarizing magnet whose coils are connected in the line circuit-,and means causing one of said. differential magnet coils to lag in action behind the other.

5. In a. relay, a differential armature' polarizing magnet including a slow acting coil and a quick acting coil connected in parallel inthe line, circuit.

6. In a relay, va field magnet, an armature movable between the pole piece thereof, energizing coils for the 'eid magnet connected in the line circuit, combine'd'with a differential polarizing magnet, one coil of which is in series with the field magnet coils.

7. In a relay, afield magnet, an armature movable between the pole piece' thereof, energizing coils for the field magnet con nected in the linecircuit, combined with a differential polarizing magnet, one coil of which is in series with the field magnet coils, and a non-inductive resistance in series with the other coil of said differential magnet.

8..A polarized relay including an armature movable between relatively fixed pole pieces, a differential polarizing magnet, the coils of which are connected in parallel in the line circuit.

9. In a relay, a divided circuit, an inductance and one winding of a diderential mag.-

' net connected in one branch of said circuit, t-he other branch of said circuit including the other vwinding of' said differential magnet.

10. A polarized relay including an armature movable between relatively fixed poles, combined with a differential polarizing magnet including a quick and a slow acting coil connected in parallel in line circuit.

, i il.v A polarized relay including an armature movable between relatively fixed poles,

combined with a differential polarizing magnet including a quick and a slow acting coil connected in parallel in line circuit, and` an inductive resistance in circuit with one ofsaid coils.

l2. A polarized relay including an armature movable between relatively fixed poles,

combined with av differential polarizing magnet including a quick and a sion7 acting coil connected `in parallel in the line circuit, an inductive rt istance in circuit with'one -of said coils, and non-inductive resistance `in circuit with the other of said coils.A

13. In a relay, a divided lcircuit, ono branch of which contains an inductance and one winding or a differential polarized magnet, and the other branch of which contains the other winding of said magnet, and means for retarding the. action of one. of said windings.

14. In a relay, a divided circuit, .one branch of which contains an inductance and one winding of a` differential polarized magnet, and the other branch of which contains the other winding of said magnet, and means ings, said retarding means comprising an eddy current producer over the core of. said lastl named winding.

ARTHUR L. Towivsnim.y

TWitnesses A. E. DI'ETERICH. Guo. B. Pir'rs. 

